Development of Chemical Precipitation Purchased Equipment Costs:

Tanks

Purchased Equipment Costs are the sum of the following cost elements:

(1) Pump Costs

(2) Tank Costs

(3) Chemical Feed System Costs

(4) Mixer Costs

(5) Clarifier Costs

(6) Filter Press Costs

(7) Sand Filter Costs

This Excel workbook consists of the following worksheets:

FeCl3 tank size

HCl tank size

Legend

Blue cells contain automatically calculated values.

Each cost component includes the cost of freight and associated ancillary equipment such as piping, valves, and 

controllers.

This Excel workbook supports EPA's derivation of cost element (2) using information provided in response to the Steam 

Electric Survey and vendor data.

The following worksheets present EPA's determination of the maximum wastewater flow rates that do not require chemical 

storage tanks for FeCl3 and HCl based on the dosage rate, assumptions made from survey data using engineering 

judgement, and assumptions provided by a chemical feed system vendor. In each sheet, the user can modify the values in 

column F to automatically calculate the blue cell values. The values calculated include the maximum wastewater flowrate 

that does not require a chemical storage tank, and for flow rates greater than this maximum flow rate, the range of tank 

sizes required based on expected flow rates and storage capacity. This information is used to determine whether a 

chemical storage tank will be costed for a particular plant.

Calculates the maximum wastewater flow rate that does not require a chemical storage tank 

for FeCl3. Note that the flow rate exceeds the maximum expected wastewater flow rate, 

therefore it is not expected that many plants will require FeCl3 storage tanks.

Calculates the maximum wastewater flow rate that does not require a chemical storage tank 

for HCl.

CBI DATA: Yellow cells contain dosage data calculated based on CBI survey responses.
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 survey responses.
Assume that totes are change no more than: 1 time per day

Assume the tote size is: 275 gal

Assume the dosage is: [Redacted] g chemical/L WW

Capacity factor: 1.47

Max addition per day: 275 gal

Max addition rate of chemical: 0.19097222 gpm 11.458333 gph

Max wastewater flow rate: [Redacted] gpm

Storage capacity: 15 days

Min tank size: 4125 gal

Max flow rate: 1000 gpm

Max tank size: [Redacted] gal

At flow rates greater than that listed above, FeCl3 storage tanks will be required. Tank size will be calculated based on the act

corresponding to the above WW flow rate, and therefore the smallest tank size that may be needed, follows:
Constants and conversion factors

FeCl3 density 1.41 kg/L

FeCl3 % concentration 35%

g/kg 1000

Dose conversion factor 0.002026 L/g Converts weight dosage (g chemical/L ww) to volume dosage (gal chemic

min/day 1440

 calculated based on the actual WW flow rate. The tank size 

ed, follows:
o volume dosage (gal chemical/gal ww)
Assume that totes are change no more than: 1 time per day

Assume the tote size is: 275 gal

Assume the dosage is: [Redacted] g chemical/L WW

Capacity factor: 1.47

Max addition per day: 275 gal

Max addition rate of chemical: 0.19097222 gpm 11.458333 gph

Max wastewater flow rate: [Redacted] gpm

Storage capacity: 15 days

Min tank size: 4125 gal

Max flow rate: 1000 gpm

Max tank size: [Redacted] gal

At flow rates greater than that listed above, HCl storage tanks will be required. Tank size will be calculated based on the actu

corresponding to the above WW flow rate, and therefore the smallest tank size that may be needed, follows:
Constants and conversion factors

HCl density 1.225 kg/L

HCl % concentration 32%

g/kg 1000

Dose conversion factor 0.002551 L/g Converts weight dosage (g chemical/L ww) to volume dosage (gal chemic

min/day 1440

lculated based on the actual WW flow rate. The tank size 
o volume dosage (gal chemical/gal ww)